MESON Chess Problem Database

Problem Display
PID: 11450 (2N4K/8/2n2Q2/1nkp2p1/Pp3p2/1Pb1q3/2R1N3/6BB w - - 0 1)

Howard, Kenneth Samuel

American Chess Bulletin, 1939

2N4K/8/2n2Q2/1nkp2p1/Pp3p2/1Pb1q3/2R1N3/6BB

#2

9 + 9

5089 The Enjoyment of Chess Problems 1943
5088 How to Solve Chess Problems 1945

SOLUTION

  • SOUND
  • Sets
    • 1...Sbd4
      • 2.Qd6#
    • 1...Scd4
      • 2.Qb6#
    • 1...Se5
      • 2.Qb6#
    • 1...d4
      • 2.Qxc6#
  • Tries
    • 1.Sxf4?
      • threat
        • 2.Sd3#
        • 2.Se6#
      • 1...Se5
        • 2.Qb6#
      • 1...Sbd4
        • 2.Qd6#
      • 1...Sc7
        • 2.Sd3#
      • 1...Scd4
        • 2.Qb6#
      • 1...Sa5
        • 2.Sd3#
      • 1...Sca7
        • 2.Sd3#
      • 1...Se7
        • 2.Sd3#
      • 1...Sb8
        • 2.Sd3#
      • 1...Sd8
        • 2.Sd3#
      • 1...d4
        • 2.Qxc6#
      • 1...gxf4!
    • 1.Bxe3+?
      • 1...Sbd4
        • 2.Qd6#
      • 1...Scd4
        • 2.Qb6#
      • 1...d4
        • 2.Qxc6#
      • 1...fxe3!
    • 1.Rxc3+?
      • 1...Sxc3
        • 2.Qd6#
      • 1...bxc3!
  • Keys
    • 1.Sc1!
      • threat
        • 2.Sd3#
      • 1...Se5
        • 2.Qb6#
      • 1...Sbd4
        • 2.Qd6#
      • 1...Scd4
        • 2.Qb6#
      • 1...d4
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(e);N_PINQ(G),N_SPINQ(b)::QAB1(G)
    • S(i);N_PINQ(G),N_SPINQ(b)::QAB1(G)
    • S(i);N_PINQ(G)::QAB1(G)
    • P(g);N_PINQ(G),N_SPINQ(b)::QAR1(G),XS(i)
  • Tries
    • Try
      • S(D);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);N_PINQ(G)::QAB1(G)
        • S(e);N_PINQ(G),N_SPINQ(b),SBLOCK::QAB1(G)
        • S(e);::S(D)
        • S(i);N_PINQ(G),N_SPINQ(b),SBLOCK::QAB1(G)
        • S(i);::S(D)
        • P(g);N_PINQ(G),N_SPINQ(b),SBLOCK::QAR1(G),XS(i)
      • Refutation
        • P(h);XS(D)
    • Try
      • B(A);CHECK,XQ(b)
      • Vars
        • S(e);N_PINQ(G),P_SPINS(e)::QAB1(G)
        • S(i);N_PINQ(G),P_SPINS(i)::QAB1(G)
        • P(g);N_PINQ(G),P_SPINP(g)::QAR1(G),XS(i)
      • Refutation
        • P(d);XB(A)
    • Try
      • R(C);CHECK,N_SPINQ(G),XB(a)
      • Vars
        • S(e);XR(C)::QAB1(G)
      • Refutation
        • P(c);XR(C)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(i);N_PINQ(G)::QAB1(G)
      • S(e);N_PINQ(G),N_SPINQ(b),SBLOCK::QAB1(G)
      • S(i);N_PINQ(G),N_SPINQ(b),SBLOCK::QAB1(G)
      • P(g);N_PINQ(G),N_SPINQ(b),SBLOCK::QAR1(G),XS(i)
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